Hardware for timber joinery that stays put during assembly, promising fewer fiddly adjustments. AHC Steel Cup Square Bolts with Nuts combine a round head and a square neck to stop the bolt turning as the nut is tightened, giving greater control on site. Are these fasteners the right choice for common DIY and renovation jobs?
⚡ At a Glance
- • Holding Reliability: Square neck seats into the timber to prevent rotation while tightening, reducing slippage
- • Best for: Carpentry and timber frame connections where bolts must remain stationary during assembly
- • Not ideal for: Metal-to-metal structural joins that require specialist high-strength fasteners
Round head with a square neck prevents the bolt from turning while the nut is tightened. A matching hex nut is included for immediate assembly.
Confident Tightening – With square-neck round-head geometry
Square neck locks into the timber grain so the bolt cannot rotate when torque is applied to the nut. The round head gives a broad bearing surface to spread load across the timber face.
Fewer slips and less need for a second pair of hands means faster, neater connections in everyday woodworking.
Corrosion Resistance – Thanks to zinc-plated finish
Zinc plating forms a protective coating over mild steel to slow surface corrosion under normal conditions. The finish increases resistance to moisture compared with unplated fasteners.
Longer service life for indoor and exposed joinery, reducing the risk of early rust-related failure.
Ready to Install – With matching hex nut included
Each bolt is supplied with a hex nut sized to mate with the bolt thread, allowing a complete assembly straight from the pack. No separate nut matching is required for standard installations.
Immediate use on site saves time and ensures the correct nut fit for secure clamping of timber members.
✨ The 4 Key Reasons for AHC Steel Cup Square Bolts with Nuts
- Mild steel construction - Consistent strength for common timber fastenings without specialist tools
- Round head profile - Broad bearing surface reduces material pull-through in soft timber
- Zinc-plated finish - Extra corrosion resistance helps maintain integrity in damp environments
- Pack of 10 - Keeps enough fasteners on hand for multiple small projects
📋 Technical Details at a Glance
- Category: Home Improvement hardware
- Brand: AHC
- Material: Mild steel
- Size: M8 x 180mm
- Head type: Round head
❓ Frequently Asked Questions
Q: Are nuts included with the bolts?
A: Yes, a matching hex nut is included with each bolt, allowing immediate assembly.
Q: What are these bolts best used for?
A: They are ideally suited for timber-to-timber joining, where the square neck prevents the bolt turning while the nut is tightened.
Q: Do the bolts resist corrosion?
A: Yes, the bolts are zinc plated to increase resistance to corrosion compared with unplated steel.
🏆 Our Verdict
Suitable for DIY enthusiasts and tradespeople who work with timber and need reliable fastenings. Square-neck round-head geometry and included hex nuts make assembly straightforward, while the zinc plating helps reduce corrosion. Affordable for routine projects and built to deliver dependable long-term value through durable construction.
